Secondary-battery plate and method of making same.



PATENTED APR. 16, 1907.

No. 850K788.

L. N. J. ROSELLE. SECONDARY BATTERY PLATE AND METHOD OF MAKING SAME.

APPLICATION FILED FEB.13,1905.

QSU Z W% 6 n.. mm n MW wwr 4 M6 lll lt ll llf l lllil fitttcntecl April.3.6, 1907.

Application 11,

il fehrzmrgl18.19051 Serial 1c. 245,474.

75b 16/? whamriw y c0 21: be it Kncwn that i, Let c harm: e .lleermmc,.en (it the Fuel. h

cbiwgangccl and guitleanarltcd in when the mold closed 1' Mulch at theirextremities,

resicl v at Fe as, ill Rue (l4: la ll lilllil l a. in l"? .ilfl'er thepurpose of lern'iing can in'venl vd. certain new are uevlul .lmprc'w'lI-lfi er hnres j in the cast core, which pass ments inleecerulery-icltery dlfitl right tlmuigli it, eeen in. Fig. l. TheMethecl el Mela: I thcl .l is; itlri i) prm'ided at its englee withlolhmrurgusaepcc {chew ls serving t0 form slots in in the This ln'ventiule elm-ct t l'=?"l'l'$- we, curlv-ihlch slots terminates in an eve. forthe n'lel'iul e cl. plea. l When the Pe of active 'n'invterlel is castin electric better com )ilSlIl" a, (amt-e Ulflztlllllkl l the run-imm-(lQ. ihetl it is removed from. the

. l i l by fusion, casting", and molding cml e sup mold, and hclcre it15 completely cool (prelpert termed by casting around. the hillll ccre.erchly n :l note, state as pessible) it is The lnventlonconsists,hrcmlly,inform 1m; placed in it n:l "l'nele l, when the support byfusion, cestii'ig, and molding a cure active material and in castingt'l. ll.l1l j. core a support presenting the form of :1. grid. The lave;cl charm of the meld fer cnsthig with multiple ramifications, thissuppert li 0- the cupped m.- g rial is sulvstantielly the same ing castin a mold the core which ccni 'll y we mehl fer cmting: the core, l1ig'.stitutecl by the care of active material itself, an is .prc'vulell withtlIliUlS which, as indicated, has pre /finely been; 7 1 5, andmetliigcalazmnels 5;, and in order that my invent m max e gre-emzwl inshah :1 11111111101. fully understcetl I will LlBSUIl h 1c lcctiem:which as :1, whole Term cf mold. by mcens 01 which. thl. prcccce in termthe levee. cl the grill or carried into practice. Ewell mehl we; a. do11.0mm e cl the in /entice 1; l1v cf the are illustrated in theaccompanying llrc terminartof Whichv c wound said core and in the ntms ec re F at the an. m pert sluts 0,

mcrulmg with. the slots Figure 1 is c. perspective view of the meld mlthe core. V for casting); the care. shows one of i i The preccss is:carried out in following inner walls with the grooves and prejcctiuue lmanner: The l'm'nitttioii of the core consists tl'lereon. Fig. 3 is a.cross-section threugh l in 2m crzlinztr casting operation in. the moldline A B of Fig 2. Fig. 4 shows the cure cl of Figs. .2 my. came beinglltll to avoid any active material after resting. Fig. reprcl sud-(lee.cooling: in order that the melecular sents ene of the inner Walls of themchl 'l'er mmllitien ol' the rmiterinl may net he illOllflcasting thegrid or support for the (were. lllHl, ec-

te lc'w'e the finished plate in a Fig. 6 is a. perspective view ct afart cl' mill. etmin er to cruise the same to warp. grid or support. lln (mlcr to cztet the en ppcrt or grid, which The process according tethis him-mien 1 'i:--; pic-llwzi-lfly hmncll cl :mtimenic lcml, tl'lercconsists in first casting the cei'c cr scgz ment l is plmzcll within thesecond mold, Fig. 2, and elf active materiel. in a. mehl. lerhictl. cltwc while yet in a hut stetc the cure of active Inapertsaaml 1,connected enc with the other f lerin-l, which has zth'cellyhcenprepared, the foreminplc,liynieanscf2i.l1lngec--en l catch j mellllining: then. closed. t l hen the mold previtletl with a handle at,permitticg ll-he lists lwen llllill with the metal in a, state ofclosing of the meld. During the cacti tr .l'ueilmfllhcrc termed m'cumlthccoi'e at supeperzttion the closing of the mehl lllWlHHl cert in c -lciec1:-.,'lhc hereof which c0nby means ole suitable device, such. it Iitute the we m. the support and rcetupcn ring e. i I. "ecec of the cercamvl are united one with The internal crrzingement cf the mehl, theether 'hy n'icime cl as many hicenical :0 which may be seen. in Fig.2,'cum risc:- twc trehewree here me there cevitiee 'j in-thc wxir holesor wants f, a principal wasting l core. .l.hcsclmrc formictheectivemateriel channel or gcet g, and small casting-clmnnele e0 manycentuctc're er cnlh'lctme for the cur h, giving rise to it car-sting,which i'wmie'veti 1 rent. .l n mhlitien a. llill'crcnce of thicknessalter cooling. l between. the interior of the n oltl and the cure noEach inner face carries :1, series cl ircjec- I Fem-nits cl theformation upon the entire surt10n,s t, presentmg the lerm el' :1truncated l ace efthe cure cl 1L thin. lihn ul' nictztl, which thislatterthat is to say, While it is still hot'enough to prevent injury toor exhaustion of its surface on-contact with the metal in fusion. Thefinal product is therefore a secondary-battery plate the core of activematerial of which and its support are united by casting, so as to form asingle piece.

The slots and eyes provided at the angles im art to the whole,especially to the frame, sufficient elasticity to permit of freeexpansion of the plate during charging arid contraction duringdischarging. If desired, the number of these slots provided with eyesmay be increased, forming them upon the sides of the frame itself.

The contacts or collectors, which extend right through the activematerial, may be of any form'other than that described, if de sired. Forexample, they may present a double conical, cylindrical, prismatic,orpolyhedral formation. In the same way the form and disposition of thebars of the grid may vary widely in accordance with requirements.Finally, the process may also be carried into practice by means of amultiple mold for casting in a single operation several supports aroundtheir respective cores.

Having now particularly described and' ascertained the nature of myinvention and in What manner it may be performed, I declare what I claimis 1. The process of manufacturing plates for secondary electricbatteries, which consists in casting or molding in a mold a core ofacentire surface of said core between the ramifications ofthe grid athin film ofmetal, then allowing the Whole to cool slowly and finallyremoving the thin film of metal.

2. The method herein described of manu facturing plates for secondarybatteries,

which consists in casting a coreof active material, and casting'aboutsaid core a grid provided with ramifications, said grid being providedbetween said ramifications with a comparatively thin film of metal,allowing the entire mass to cool, andfinally removm said thin film ofmetal. I g

3. The process of manufacturing plates for secondary electric batterieswhich consists in molding or casting a core of active material in thefirst mold shaped so as to form at the angles of the core notches termisna'ting in an eye, then casting around said core while in a hotconditiona ramified grid or support in a second mold shaped so as to form at theangles of the grid notches terminatin in an eye, which eye correspondsto thenotc es in thecore, the said grid having a thin film of metalbetween the ramifications thereof, permitting the plates to cool slowlyand removing the film from the id.

In testimony of which have hereunto set my hand, at Paris,.the 30th dayof January,

I LOUIS NESTOR JOSEPH ROSELLE.

In presence of- HENRY SOHWAB, HANSON O. COXE.

